There's no ansible.module_utils_unicode

lib/ansible/plugins/lookup/__init__.py

@@ -98,7 +98,7 @@ class LookupBase(with_metaclass(ABCMeta, object)):
         must be converted into python's unicode type as the strings will be run
         through jinja2 which has this requirement.  You can use::
 
-            from ansible.module_utils.unicode import to_unicode
+            from ansible.utils.unicode import to_unicode
             result_string = to_unicode(result_string)
         """
         pass

lib/ansible/plugins/lookup/fileglob.py

@@ -22,7 +22,7 @@ import glob
 
 from ansible.plugins.lookup import LookupBase
 from ansible.errors import AnsibleFileNotFound
-from ansible.module_utils.unicode import to_bytes
+from ansible.utils.unicode import to_bytes
 
 class LookupModule(LookupBase):